This approach by David Lyn has been implemented before.
That was by the Yamiriko Federation.
In the old days, people gathered in the alliance of Yamiriko, living in equality and wealth, and since poverty and conflicts were eliminated, the army existed only to combat natural disasters.
Bai Sijia, as part of the elite class, naturally knew that history.
The Yamiriko Federation was a civilization that made contact with extraterrestrial civilizations, so grand that it hoped to establish a nation akin to those of cosmic civilizations on this planet.
But that was impossible.
Yamiriko blindly pursued technology, freedom, and equality, yet little did they know that Lord Entropy had already been ignited with anger by them.
On this land where Old Gods are not dead, any attempt to reform society with advanced technology and tactics will ultimately bring disaster.
Thus, Yamiriko perished.